AD 90-19-04

Final rule

90-19-04 BRITISH AEROSPACE: Amendment 39-6721. Docket No. 90-NM-84-AD.

Applicability: Model BAe 125-800A series airplanes, Serial Numbers 258001 through 258090, inclusive, certificated in any category.

Compliance: Required prior to the accumulation of 6,000 landings since new or within 30 days after the effective date of this AD, whichever occurs later, unless previously accomplished.

To prevent fatigue cracks in the windscreen center pillar and subsequent rapid decompression of the airplane, accomplish the following:

A. Install reinforcing straps on the bottom aft portion of the upper and lower web sections of the windscreen center pillar assembly in accordance with British Aerospace Service Bulletin 53-65-3168A, Revision 1, dated March 9, 1989.

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM- 113, FAA, TransportAirplane Directorate.

NOTE: The request should be submitted directly to the Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041-0414. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.

This amendment (39-6721, AD 90-19-04) becomes effective October 16, 1990.